Drill bit



H. L. KLESS Feb. 11, 1936.

DRILL BIT Original Filed May 22, 1953 2 Sheets-Sheet l Inventor H. l: fi/ews Feb. 11, 1936. KLESS 2,930,374-

DRILL BIT Original Filed May 22, 1953 2 Sheets-Sheet 2 Invenior Pa tentecl Feb. 11, 1936 v UNITED STATES PA-T-E NT- OFFICE Q aosaa'zr f DRILLBIT 7 n I HermangLouis Kless, Houston, Tex. 7 Application May 22, 1933, Serial no. 672331 Renewed August 21-, 1935 '7 Claims. (Cl. 255-61) The present invention relates to new and useful the cutting edges 6. Branch outlets 9 communiimprovements in well drill bits of the fluid discate with the fluid passages 1 for washing the charge type and has for one of its important cutting edges 6. objects to provide, in a manner as hereinafter It is believed that the many advantages of a set forth, a bit of this character embodying a drill bit constructed in accordance with the 5 novel construction and arrangement through the present invention will be readily understood, medium of which clogging of the fluid passages particularly by those skilled in the art, and alwhen the bit is in operation will be prevented. though the preferred embodiment of the inven- Other objects of the invention are to provide a tion is as illustrated and described, it is to be 0 drill bit of the aforementioned character which understood that changes in the details of con- 0 will be simple in construction, strong, durable, struction and in the arrangement of parts may highly eflicient and reliable in use, compact and be resorted to which will fall within the scope of which may be manufactured at low cost. the invention as claimed.

All of the foregoing and still further objects What is claimed is:- and advantages of the invention will become ap- 1. A drill bit comprising a body having fluid 15 parent from a study of the following specificapassages therein communicating with the lower tion, taken in connection with the accompanying end of the bit and extending to the trailing faces drawings wherein like characters of reference of said bit on opposite sides of its. longitudinal designate corresponding parts throughout the axis, and reaming cutters .on the vertical edges several views, and wherein:- of the body, each cutter having a concaved front Figure 1 is a view in side elevation of a drill face and a rearwardly and inwardly sloping outer bit constructed in accordance with the present edge, portions of the passages opening out invention. through the trailing faces of said cutters.

Figure 2 is a view in edge elevation thereof. 2. A drill bit comprising reaming cutters on Figure 3 is a bottom plan view. the vertical edges thereof, breaking cutters on the 25 Figure 4 is a vertical sectional View through a forward face portions of the bit on opposite sides lower portion of the bit. of the longitudinal axis thereof, said breaking Referring now to the drawings in detail, it cutters paralleling the reaming cutters, said bit will be seen that the embodiment of the invenhaving fluid passages therein communicating tion which has beenv illustrated comprises a with the lower end thereof and having portions 30 body I from which the usual threaded shank 2 opening out through the trailing faces of the rises. On opposite sides, the body I has its Verreaming cutters. tical marginal portions concaved, as at 3, and 3. A drill bit comprising reaming cutters on formed to provide cutting edges 4 which ream the vertical edges thereof, breaking cutters on the r and smooth the walls of the hole, said cutting forward face portions of the bit on opposite sides edges 4 being inclined forwardly toward their of the longitudinal axis thereof, said breaking lower ends, as illustrated to advantage in Figure 2 cutters paralleling the reaming cutters, said bit of the drawings. Spaced notches or recesses 5 having fluid passages therein communicating are formed in the vertical side edges of the with the lower end thereof and provided with 40 body I. angularly extending portions communicating The body I is also formed, on opposite sides, with the trailing faces of the bit, the bit further to provide forwardly projecting substantially having fluid branches therein communicating wedge-shaped or triangular cutting edges 6 with the passages for washing the breaking which parallel the reaming edges 4, as best seen cutters.

in Figure 2 of the drawings. The advanced 4. A drill bit comprising reaming cutters on cutting edges 6 serve to break up the cuttings the vertical edges thereof, breaking cutters on in a manner to facilitate the washing of said the forward face portions of the bit on opposite cuttings out of the hole. sides of the longitudinal axis thereof, said break- Extending through the bit from end to end ing cutters paralleling the reaming cutters, said thereof are downwardly diverging fluid passages 1 bit having fluid passages therein communicating 50 which, as illustrated to advantage in Figures 3 with the lower end thereof and provided with and 4 of the drawings, communicate with the angularly extending portions communicating trailing faces of the side portions of said bit with the trailing faces of the bit, the bit further through the medium of rearwardly directed pashaving fluid branches therein communicating 55 sages 8, said passages 8 being substantially behind with the passages for washing the breaking outters, the vertical edges of the bit having spaced recesses therein.

5. A drill bit of the class described comprising a narrow body of considerable width and having its vertical side edges beveled to provide a cutting edge at one side of one face and a second cutting edge at the side edge of the other face and said body having fluid passages therein extending out to the lower end of the body and having portions at their lower ends opening out through the trailing faces of the cutters.

6. A drill bit of the class described comprising a narrow body of considerable width and having its vertical side edges beveled to provide a. cut-m and said body having fluid passages therein opening out to the lower end of the body and having portions at their lower ends opening out through the trailing faces of the cutters, each cutting edge having vertically spaced recesses therein.

7. A drill bit of the class described comprising a narrow body of considerable width and having its vertical side edges beveled to provide a cutting edge at one side of one face and a second cutting edge at the side edge of the other face and said body having fluid passages therein opening out to the lower end of the body and having portions at their lower ends opening out through the trailing faces of the cutters, and a vertically arranged substantially V-shaped projection on each face of the body, said projections being spaced outwardly from the axis of the body, the apexes of said projections forming breaking cutters.

HERMAN LOUIS KLESS. 

